James biggins



UNITED STATES PATENT OFFICE.

JAMES HIGGINS, oE MOETAGUE, MIoIIIGAN.`

4 IMPROVEMENT IN COUPLINGS FOR STANDINGRIGGING.

Specification forming part of Letters Yatent No. 130,049, dated July 3d, 1872.

` partly broken away; Fig. 2, an end elevation;

and Fig. 3, a detail view of one of the hooks.

A represents one hook, having hollow and 'taperin g shank c, to which the other is made to correspond, but reversed. On `their sectional faces they aresmooth, and made to coincide, as shown in Fig. 3 of drawing. B is a tapering sleeve, and C a piece of wood having tapered portion o and the shouldered portion c.

The application is as follows: The hooks'A are each placed over a ring from oppositedirections until they coincide on their inner faces. The sleeve B is caused to slide on the wood C, with its smaller end toward theshouldered portion o. The Shanks a a spread apart, while the conical portion of the wood C is inserted between them and the Sleeve; then pushed over said Shanks. Any strain upon either Wood or hooks will cause the taper of the wood to press outwardly the reverselytapered and sectional hook-shank against the sleeve, and thus prevent all Separation of the parts.v

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The hooks A A having internally concave and tapering Shanks a a and the taperingV sleeve B, combined with a tapering piece, O

c, as and for the purpose described.

, JAMES HIGGINS.

Witnesses: IRvINGDAvIS, MARY J. DAvIs. 

